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/usr/include/boost/smart_ptr/detail

Name	Size	Mode	Actions
atomic_count.hpp	3232	0644	edit dl rm
atomic_count_gcc.hpp	1623	0644	edit dl rm
atomic_count_gcc_atomic.hpp	1277	0644	edit dl rm
atomic_count_gcc_x86.hpp	1739	0644	edit dl rm
atomic_count_nt.hpp	1200	0644	edit dl rm
atomic_count_pt.hpp	2060	0644	edit dl rm
atomic_count_spin.hpp	1306	0644	edit dl rm
atomic_count_std_atomic.hpp	1349	0644	edit dl rm
atomic_count_sync.hpp	1435	0644	edit dl rm
atomic_count_win32.hpp	1354	0644	edit dl rm
lightweight_mutex.hpp	1257	0644	edit dl rm
lightweight_thread.hpp	3442	0644	edit dl rm
local_counted_base.hpp	3217	0644	edit dl rm
local_sp_deleter.hpp	1731	0644	edit dl rm
lwm_pthreads.hpp	1753	0644	edit dl rm
lwm_std_mutex.hpp	1077	0644	edit dl rm
lwm_win32_cs.hpp	2796	0644	edit dl rm
operator_bool.hpp	1731	0644	edit dl rm
quick_allocator.hpp	5137	0644	edit dl rm
shared_count.hpp	15367	0644	edit dl rm
spinlock.hpp	1863	0644	edit dl rm
spinlock_gcc_arm.hpp	2701	0644	edit dl rm
spinlock_gcc_atomic.hpp	1519	0644	edit dl rm
spinlock_nt.hpp	1626	0644	edit dl rm
spinlock_pool.hpp	2954	0644	edit dl rm
spinlock_pt.hpp	1474	0644	edit dl rm
spinlock_std_atomic.hpp	1723	0644	edit dl rm
spinlock_sync.hpp	1644	0644	edit dl rm
spinlock_w32.hpp	2104	0644	edit dl rm
sp_convertible.hpp	2157	0644	edit dl rm
sp_counted_base.hpp	3480	0644	edit dl rm
sp_counted_base_acc_ia64.hpp	3498	0644	edit dl rm
sp_counted_base_aix.hpp	3270	0644	edit dl rm
sp_counted_base_cw_ppc.hpp	3426	0644	edit dl rm
sp_counted_base_gcc_atomic.hpp	3331	0644	edit dl rm
sp_counted_base_gcc_ia64.hpp	4010	0644	edit dl rm
sp_counted_base_gcc_mips.hpp	4097	0644	edit dl rm
sp_counted_base_gcc_ppc.hpp	3877	0644	edit dl rm
sp_counted_base_gcc_sparc.hpp	3850	0644	edit dl rm
sp_counted_base_gcc_x86.hpp	3936	0644	edit dl rm
sp_counted_base_nt.hpp	2733	0644	edit dl rm
sp_counted_base_pt.hpp	3726	0644	edit dl rm
sp_counted_base_snc_ps3.hpp	3776	0644	edit dl rm
sp_counted_base_spin.hpp	3073	0644	edit dl rm
sp_counted_base_std_atomic.hpp	3557	0644	edit dl rm
sp_counted_base_sync.hpp	3326	0644	edit dl rm
sp_counted_base_vacpp_ppc.hpp	3697	0644	edit dl rm
sp_counted_base_w32.hpp	3264	0644	edit dl rm
sp_counted_impl.hpp	6808	0644	edit dl rm
sp_disable_deprecated.hpp	983	0644	edit dl rm
sp_forward.hpp	1180	0644	edit dl rm
sp_has_gcc_intrinsics.hpp	786	0644	edit dl rm
sp_has_sync_intrinsics.hpp	1872	0644	edit dl rm
sp_interlocked.hpp	6567	0644	edit dl rm
sp_noexcept.hpp	1185	0644	edit dl rm
sp_nullptr_t.hpp	976	0644	edit dl rm
sp_obsolete.hpp	914	0644	edit dl rm
sp_thread_pause.hpp	1101	0644	edit dl rm
sp_thread_sleep.hpp	2016	0644	edit dl rm
sp_thread_yield.hpp	1883	0644	edit dl rm
sp_typeinfo_.hpp	1176	0644	edit dl rm
sp_win32_sleep.hpp	1168	0644	edit dl rm
yield_k.hpp	1091	0644	edit dl rm

Edit: /usr/include/boost/smart_ptr/detail/operator_bool.hpp (1731B)

//  This header intentionally has no include guards.
//
//  Copyright (c) 2001-2009, 2012 Peter Dimov
//
//  Distributed under the Boost Software License, Version 1.0.
//  See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt

#if !defined( BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS ) && !defined( BOOST_NO_CXX11_NULLPTR )\
    && !(defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x5130))

explicit operator bool () const BOOST_SP_NOEXCEPT
    {
        return px != 0;
    }

#elif ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, < 0x570) ) || defined(__CINT__)

operator bool () const BOOST_SP_NOEXCEPT
    {
        return px != 0;
    }

#elif defined( _MANAGED )

static void unspecified_bool( this_type*** )
    {
    }

typedef void (*unspecified_bool_type)( this_type*** );

operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
    {
        return px == 0? 0: unspecified_bool;
    }

#elif \
    ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
    ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) ) || \
    ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590) )

typedef element_type * (this_type::*unspecified_bool_type)() const;

operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
    {
        return px == 0? 0: &this_type::get;
    }

#else

typedef element_type * this_type::*unspecified_bool_type;

operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
    {
        return px == 0? 0: &this_type::px;
    }

#endif

// operator! is redundant, but some compilers need it
    bool operator! () const BOOST_SP_NOEXCEPT
    {
        return px == 0;
    }

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